-8.76% is the change from 639 to 583
Calculation steps:
[( 583 - 639 ) ÷ 639] x 100 = -8.76%
Formula
Percentage change = [(583 - 639) / 639] x 100
Subtract the new number by the original number
583 - 639 = -56
-56 ÷ 639 = -0.08763693270735524
-0.08763693270735524 x 100 = -8.76%